Problems with KMS on drm-intel-next branch

[Zhenyu Wang]

On 2009.03.17 07:25:52 +0800, Mike Lothian wrote:
> 2009/3/16 Jesse Barnes <jbarnes at virtuousgeek.org>:
> > On Sunday, March 15, 2009 6:23:59 am Mike Lothian wrote:
> >> Hi
> >>
> >> I've been using KMS  on Intel since it was merged with 2.6.29. In
> >> parallel to this I've also been testing the drm-intel-next branch of
> >> anholt's git tree
> >>
> >> This stopped working for me about 2 weeks ago.
> >>
> >> When the kernel normally switches to the correct resolution on
> >> mainline the drm-intel-next kernel turns the screen black then slowly
> >> gets brighter from the edges going through purple into white, showing
> >> all the imperfections in the screen
> >>
> >> I'm not sure what's happening in the background as my laptop never
> >> gets to the point where I can SSH in.
> >>
> >> It's a:
> >>
> >> 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4
> >> Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
> >> 00:02.1 Display controller [0380]: Intel Corporation Mobile 4 Series
> >> Chipset Integrated Graphics Controller [8086:2a43] (rev 07)
> >>
> >> Hope this helps in some way
> >
> > If it used to work but now doesn't, you may be able to use "git bisect" to get
> > down to the offending commit.  Either way, please file a bug at
> > bugs.freedesktop.org for this problem if one doesn't already exist.
> >
> > Thanks,
> > --
> > Jesse Barnes, Intel Open Source Technology Center
> >
> 
> Hi I've just finished bisecting and the "dodgy" commit was:
> 
> drm/i915: Use LVDS config in Driver feature BDB for integrated LVDS check
> ed356c1946edc4017799de0371ef229bffa5e72c
> 
> I hope this helps

That commit has drawbacks and needs rework. Could you attach bios_reader output?
The utility is under xf86-video-intel/src/bios_reader, make sure you're on git tip
or 2.7 branch.

-- 
Open Source Technology Center, Intel ltd.

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